Let me declare a vested interest first. I have such a thing for sale, 18" .
http://cgi.ebay.co.uk/Raleigh-Dyna-Tech ... dZViewItem
Now that's out of the way; I bought a stripped frame for Â£75. I then had it professionally refinished (and all the bonding checked out) by Argos of Bristol. That cost me Â£190. I then fitted a Stronglight X15 headset (Â£25) and some original Decals that I found on ebay (Â£5) and a Raleigh Burner head badge (as the Dyna-Techs use a rather large head tube and I could not find a metal badge that would fit), that was also a fiver.
The new RRP of the Dyna Tech was Â£499
I consider it a good buy if I get retro stuff for 50% of the new price.
Rough Dyna Tech frames have gone for very little, but the cost of refinishing is high if you want a 'factory' look, also buyer beware with old bonded frames.
I want to see Â£200 for mine, just to recoup the bulk of the outlay.
If you paid less than Â£250 for a good one, or less than Â£100 for a rough one then you will have done well.
Somerset, like 'Heartbeat' with newer cars!
Retro MTB: 1992 Cannondale 3.0 Deore XT M730. 1992 Marin Pine Mountain Deore DX M650.
Retro road: 1992 Eddy Merckx Corsa Extra Telekom Shimano 600 STI. 1993 Dyna Tech Ti.
Modern: 2006 Wilier scandium Ultegra 6600. 2014 Wilier GTR Ultegra 6800.