Multi Item Checkout

You could look to integrate e-junkie. I use it on TemplateCodes.

If you are presenting advertisers with an opportunity to purchase other stuff then you are perhaps better off redirecting them at the end of the checkout process to a static page where you can use paypal, e-junkie etc.

There's nothing existing that does what you describe. I imagine a custom module could be made for something like that as an additional step in the checkout process prior to the final checkout, or a pop up window to add extras.

They would still need to go through the 68 checkout process, then just a "detour" so to speak to add the additional options and then back into the checkout to finalize and pay and process the order to activate the listing.

If you're interested in developing such a module yourself, then start with the developers online documentation for modules.

If you are trying to up sell, you would be better doing this at the end of the checkout. You would not need a module to do this. Also, I don't see how it makes sense to do it within the checkout unless you can add the payment for the actual listing into the cart (which you can't unless the cart supports IPN for example - paypal example).

I believe that you are missing the whole point. Doing what you suggests, makes the buyer go through a separate purchase after paying for their listing, whether it's e-junkie or whatever cart system that you are suggesting. How is that better?

Let's define some things here...
Cart: A mechanism to hold items to be purchased.
Payment System: A system allowing a customer to pay for items in their cart or hands.

The cart itself doesn't have anything to do with paying for the items that you put in it.

68 Classifieds doesn't have a cart (it uses your 'hands'), but does have a Payment system.

A grocery store analogy of this process:
The way you are suggesting: You walk in and go through the store. You pick up a listing in one hand, you can possibly hold a few extra items in your other hand such as a featured, bold and highlighted upgrade. You go to the register and pay for the listing and the upgrades that you can carry in your hands. When you pay for the items, the store activates your listing.

Now, you walk out with your purchased item and upgrades. There's a separate vendor outside selling some shiny things that you also want. So you pick up those additional items and then pay for them (a separate purchase).

The way I'm suggesting, using a module (acting like a cart): You walk in and go through the store, the same as above, BUT when you are in the line for the register, there's a rack of impulse buy items with a basket (the module). You grab the basket, put your listing and upgrades in it and then you ALSO put in a snickers bar, a pack of gum and some batteries. You then proceed to the cash register and pay for ALL of your items at once using the ONE payment system provided by the store which then still activates your listing and upgrades and you walk out.

Correct. If you care to read - you do anything during the checkout process and you will be into complexity and quite a difficult development - you will need a return signal to activate the listing for a start. I actually think it is not a great idea anyway because if you interfere with people placing ads the bounce rate will simply go up. Buying additional items en route creates decisions to be made in what needs to be the quickest and smoothest process possible (would you buy something from GDaddy - drives me nuts - I refuse). I would do it afterwards even at the 'cost' of them having to do a payment process again. At least you will have their listing and it appears honestly optional. There is also no development to do worth mentioning. You simply change the final redirection page to your affiliates page or sales page.

Well, everyone is certainly entitled to their opinion.

However, the point of this thread is that the poster wants to do it this way, allowing the user to purchase additional items at checkout.

Additionally, If you read my analogy of doing it this way there is NO NEED for

that's the whole point, it is using the 68 classifieds payment gateway system which already has the callback process in it which activates the listing (or whatever the settings are set for checkout).

I would personally be pretty pissed off if you redirected me to your affiliates site after I paid for my item to purchase additional stuff and not back to your site. But, that is just my own personal opinion. The poster and others may have a different opinion of being automatically redirected to a different site to make more purchases.

Why a different site - you can simply say, are you interested in bla bla YES or NO. Go for it Mr Sanctimonious- develop it as you clearly think you know. I will buy one from you. That will make two of us.

I hate to say it but this is basically what I said. Do it afterwards. Your only issue with a free listing is if you don't want to offer a free listing. Unless I am mistaken the listing will be posted even if they exit at this point. In general it is quite difficult to charge for a listing nowadays. Other business models seem to work better - your one included has more promise ( at this point in the process they are captive so to speak).

Good luck - real estate is one of the most competitive areas.