Hey phule,
Just had a thought. Do you recall if that kit had all the extra engine detail? It would have been shown on the boxtop; a photo of the model with the engine cowling removed or open and the engine exposed. If it's that kit, then I wouldn't bat an eyelash at $50.
Trimaster had a couple versions of several of their kits, this being one of the more popular. Kinda the same idea as Eduard's Profipack line only no resin, usually. I think some of the vary late ones may have had resin. Anyhoo, they went for alot more than the standard kits, if I recall right. And $50 wouldn't be too awful bad for one of those.
BUT, (there's always a but...) if you're not into photo-etch it may be a daunting project. Most of the extra detail in these special kits was PE. And Trimaster's PE (as well as Dragon's) was/is steel, not brass. It's a pup to work with sometimes, especially if you've never worked with PE before. I dunno if you have or not, but that's just a heads-up for 'ya.
Just another bit of info to keep you up at night!
Fade to Black...