Should be a Toshiba. Not sure about the model.

I've done search but I can't find any Toshiba model like it.

I thought it looked like a Siemens. Looks like it's a generic!

Should be this guy here:

http://www.computer-retro.de/Bilder/Laptops/4 … Defekt-1992.jpg

Notebook 486 Professional FMA 3500, Conner 270A HDD, Cirus-Logic CL-GD6235 Grafik 1992

http://www.vcfed.org/forum/showthread.php?226 … -laptop-I-found

Are there any labels or stamps on the bottom? That's typically where the most useful information for identifying unknown laptop models tends to be.

No, it has only a serial number on the back.
I'm thinking selling it on ebay, what's the recommended price should I put.

Looks like a generic clone. (unless previous owners removed stickers) Retail manufacturers would put labels on them.