The trailers pictured are CDN M-101 1/4 ton trailers, similar to the US M416 but with some improvements. They are very well built trailers and good candidates for expedition trailers.
These trailers are also available from a Canadian company and regularly sell for $850 or more. But then there's customs and shipping from Canada. Therefore, I don't think that the required opening bid is unreasonable for a trailer already in the US.
Besides, where else are you going to get a 1990s 1/4 ton trailer in the condition shown for less than $1000? Rustbucket Vietnam era M416s are now selling for $750 and up. WWII T3 and MBT trailers bring more, as do Korean War era M100s, because you are competing with military collectors (who have little use for the CDN M101) and good restoration candidates are becoming scarce. Bantam civilian T3-C trailers are also becoming quite scarce, and prices are going up.
While I know of a guy who recently required a complete and unaltered Bantam civilian trailer for less than $500, such finds are pure luck or urban myth. (Just like the holy grail of a perfect Packard in a farmer's barn.) Expect to pay at least $750 for any 1/4 ton trailer capable of restoration, all the way up to $2,000-2,500 for a fully restored "vintage" military or Bantam civilian trailer, sometimes even more.
(I might trade my restored '46 Bantam for enough cash to buy a fully equipped Adventure Trailer.) :drool:
Personally, if I needed a platform for an expedition trailer and was tired of scouring the countryside, I wouldn't hesitate to bid on one of these. (And yes, I would ask for a photo of the actual trailer for sale, although I suspect that each of them has a few dings, blemishes and rust spots, and all would require about the same time, effort and $$ to restore, so that it really wouldn't matter which one you get.)