Yeah I can see what you mean... however like you say "get what you pay for" I did hear that later GTi models didnt suffer as much from rust due to a different body treatment, I would find a breaking later mk2 gti to take the boot off it, mine has a few rust bits under the bonnet near the front but I think I will scrape these off and then treat it.
Still wondering the best way to clean the engine bay up... At Ed38 saw alot of chromed up engine bays that looked sweet and really want to sort myself out with a 2.0 bottom end transplant.