eBay and Craigslist finds

Gijs sold these frames in the beginning of the carbon era, 1990-1995.
Friend of mine has had a couple of these C4.
Not 100% satisfied, but he had a good relationship with Gijs, so it worked out quite well.
But adjustment of 8spd STI. It was a nightmare if you had no clue, no tools and no spare parts.
Al least, try to run teflon liners front to rear in case you're going to use brifters.

correction DC: your 1st remark 'nice Gijs van Tuyl without stickers' was off the mark. to be 100% clear about this: Gijs van Tuyl never made anything, Marco Bonfanti is the man behind these frames.

cheers