I have few rare Hungarian demo tapes for sale.
Some of them are ~ 20-25 years old, but all the tapes are in quite good condition.
1. Undertaking: V12BB4U (1989) - Thrash Metalhttp://www.metal-archives.com/albums/Undertaking/V12BB4U/85825
2. Slogan: Forgotten Moods (1990) - Thrash Metalhttp://www.metal-archives.com/albums/Slogan/Forgotten_Moods/86770
3. Intense Agonizing: Beginning of the End (1994) - Death Metal/Grindcore
- Actually this is not a demo, but a full length album. Never released on CD.http://www.metal-archives.com/albums/Intense_Agonizing/Beginning_of_the_End/47209
4. Abstract Butchery: Rainbow of the Pitchblack Autumn (1995) - Death Metalhttp://www.metal-archives.com/albums/Abstract_Butchery/Rainbow_of_the_Pitchblack_Autumn/258225
5. Replika: Testek (1995) - Thrash Metal
- Not too important, but interesting fact: the drummer on this demo (Árpád Kiss) was arrested in 2010 as a suspected member of an infamous Hungarian serial killer gang...http://www.metal-archives.com/albums/Replika/Testek/47294
6. Gire: On Dist. (1996) - Avantgarde/Extreme Metal
- Hand numbered. No. 31 (A side - Cancer: Death Shall Rise; B side - Gire: On Dist.)http://www.metal-archives.com/albums/Gire/On_Dist./51901
7. Dying Wish: ...On Twilight of Eternity (1999) - Melodic Death Metalhttp://www.metal-archives.com/albums/Dying_Wish/...On_Twilight_of_Eternity/50586