[Julia_Gillard_the_Honest]

I usually follow up with the seller to find out what he ended up trading for (it surprises me how many don't mind telling me). Usually it's just a little bit above what I was offering (mostly but not always in unusuals). Probably about half have buy-out prices listed. I also check the last owner's trades and start offering at (or maybe a few keys above) what the current seller paid (it's usually easy to find this trade because most of the time it happened within days of the seller acquiring it).