hi ruktam,
i'm not may, but here's my take on it
you're right in not wanting to buy a bag from a seller with low or zero feedback! it's just really tricky, because whilst it may be a genuine seller who's new to ebay and who really does want to sell their gaucho, it may just be that a scammer selling fakes has just started yet another account on ebay. so it's best to go with a seller who has at least a nice handful of feedback. i've had a very stressful and trying time buying my lady dior tote from a seller with just 1/2 feedback and that really taught me a lesson there.
i'm quite sure you can find a gaucho in the $800 - $1000 region. it's just a matter of how patience really and it does seem like the prices of geniune gauchos are dropping somewhat on ebay. so no worries there. in terms of colour, i'm not so terribly sure, the white seems to be in real demand, but honestly, i'd say go with the colour you're most drawn to and it seems like you're keen on the red. so i say, go for it! i think the red is a fantastic colour. just based on my experience in looking through the ebay auctions, the white and black ones seem to come up the most often, i rarely ever see a green one appear on ebay, but i've not really been looking that hard on ebay, so i might not be that spot on in seeing the trend there. i'm sure may could probably fill you in more about that.
and may i suggest that if you're willing to spend $800 - $1000, you might want to consider diabro.net (
CHRISTIAN DIOR - 2007 Spring Summer Gaucho Small Tote Bag (Cherry Red) - diabro.net -)? nat mentioned this wonderful site and may's bought 2 gauchos from them since and it seems like everyone is very pleased with them. the red double gaucho is retailing on diabro at $1104, $104 more than your maximum, but it's brand new and buying from diabro does take away the anxiety of say buying from ebay - seller going missing, getting a fake, etc.
well good luck in your gaucho search!