The Innovations catalogue -- of all things -- has a £35 digital airband radio, with 25 memories. No idea how well it works, and I'd be surprised if it had squelch or anything like sensible image rejection and overload, but it's the cheapest I've seen. And I think that's a first for that particular source...
R
<a href="http://www.innovations.co.uk/gus/product.asp?brand=newInnovations&cat%5Fid=0&prod%5Fid=52390& offer%5Fid=52390R&link%5Fid=&search%5Fcriteria=ML7314&price% 5Funder=10000&search%5Fcolour=&search%5Fsize=&match%5Fmethod =AND&extra=&mscs_sid=DPHPBVNB2KS92MRH0G05L0" target="_blank">http://www.innovations.co.uk/gus/product.asp?brand=newInnovations&cat%5Fid=0&prod%5Fid=52390& offer%5Fid=52390R&link%5Fid=&search%5Fcriteria=ML7314&price% 5Funder=10000&search%5Fcolour=&search%5Fsize=&match%5Fmethod =AND&extra=&mscs_sid=DPHPBVNB2KS92MRH0G05L0</a> X3U9H22M1A is the link. Ouch.