There's someone on here who is or was selling a red shell with a few extra bits still in it, think it was priced at £600? Unsure of condition.
Someone else was or is selling a black shell with a crease in it, they wanted £250 ono, think that was also G40. Looked tidy with the exception of the crease.
I paid (I think) £600 for a good condition (I'd say about 7/10) non sunroof black shell, non G40 spec. It came with some shiny bits though and I've been looking for a non sunroof black coupe for >1yr so when I saw it, got a good deal and am happy with what I paid.
There seems to be a few red and crapi green shells around at the mo. Try taking a look on club polo, ebay and pistonheads. Also gumtree and google to see what others are selling at.
Bear in mind though, just because they're priced at that, doesn't mean they'll sell at that!
I don't think red shells are in demand in all honesty! Seems to be the most common colour from what I've seen.