My entire collection! (Well, almost..)
I think the problem is that since they have over 200 pins up for trade, it would be a huge hassle to create prices for all those pins if in the end, half of them people aren't even going to inquire about. Perhaps an easier way 2infinity is people post the pin here and then you list the price for that pin in the OP. That way, if multiple people want the pin, they can all see the set price and at the same time, you wouldn't have to post every pin that you have under your trades list ^_^ Would that make things easier?
The rules put it simply: "All threads must contain prices". There's not much leeway on that rule. Yes it would be a hassle to list them along with prices, but these rules are set up for all of us to follow.
I think there's another person who started adding prices for a large collection by posting the prices for the pins people wanted most first and then has been adding pins over time. He's adding like 10-20 a day That might be more manageable