Well i guess i sit on the other side of the fence and personally can not wait until he stops banging on about it. But to offer some help in the hope that he does indeed sell them so that he quits.
If you take a copy of oscommerce, strip out the left and right columns by removing the line of code that says include xxxx box or right/left colum then you will be left with a basic product listing style centralised page. For ease just stick that part in an iframe on your main site and then in the oscommerce site admin you can list all your stations with a stock level of one. Set the oscommerce store to use stock level limits so that it does not display if already sold and install paypal payment module that will actually direct people through paypal and report the sale directly to the oscommerce cart.
I
am not sure how you link the sale to the actual showing the ad on the site but i guess you are more than capable of getting the ad details and doing that manually, you seem to have more than enough time on your hands for this project as it is so i dont think a little bit of manual work from that point will make any difference. IF YOU REALLY REALLY WANT TO MAKE IT ALL AUTOMATIC THEN READ ON:::::
Each of the stations i presume have an id of some kind in whatever system you have made, unless you are adding them all manually?? If they have an id then you add that into the oscommerce store as you add the product, maybe stick it in one of the fields you are not using like the model number field or something. As one product can only be sold once and you are using stock logging all you have to do for each station is just add a line of code to look for that station id in the orders table and then show the customers details from the order id. Sorted.
Personally i would not bother, you can see from the level of activity on ebay for the few you have done that people are not really interested and for the amount of money they seem to be selling for i would of thought it really is not worth all of the effort. Each to their own but at least this might be of some help,
Regards
