Well, the problem is that you really CAN'T avoid it.
I mean, people will be people, and you're always going to have that.
It might not always happen to you... but they'll always be out there.
People change their mind, decide to spend their money elsewhere, think it's funny to lead people on... The list goes on.
Just don't hold anything for anyone unless they SPECIFICALLY ask you to... and, even then, put a specific time limit on it:
"Okay. I'll hold them for you until you come up with the money or for one week, whichever comes first."
Also, don't *look* so dependent on them. By your responses in your thread, it seemed to me that he was the only person who showed any interest and you REALLY wanted the sale.
Two other -norelated- pieces of advice:
1) Get better images. All we can see is that the stuff's painted and that there's a WHOLE lot of red with some black & silver.
2) This is counter-productive:
Taking offers = highest bidder takes it home so if you want this lot, YOU make the first offer. and check the forge world site before you make a silly low bid.
(emphasis mine)
If you're accepting "best offer," don't imply that some offers will be considered too low. If You say "Best Offer" and the best offer you get is $50, then you should honor it. If that isn't good enough, you should offer a price you're looking for or remove "best offer" and say, "Make an Offer." Also, give a time frame. If you're going to make it "Best offer by August 30," then say that. Otherwise, it seems as if you're saying "I'm holding on to these models until someone makes me an offer I like." With the second one, people don't know how long the "bidding" is open and, after a week or 2, might spend that money. if you come back and let them know they "won" after two weeks, you might just get a "orry, Charlie."
Oh... and you will tend to get better responses on trade oriented sites over discussion oriented sites.
Hope that helps.
Eric