See http://www.aliexpress.com/store/331885 . This website has some very low cost rigs for sale. An example is a 40m Pixie at around $10 post free. You’d be hard pressed to buy the individual parts for less!
UPDATE 1430z: I have just ordered a 40m Pixie kit from them. Should be here in 2 to 3 weeks time. I hope I can manage to build it with my clumsy soldering currently.
UPDATE 2000z: G1KQH has found the same Pixie at an even better price:
Greetings RogerI could of saved you a fiver out of your pension but you had to rush in:http://www.ebay.co.uk/itm/DIY-
KITS-PIXIE-HAM-RADIO-HF-40M- CW-QRP-TRANSCEIVER-7-023-7- 026MHz-/121521131018?pt=LH_ DefaultDomain_0&hash= item1c4b394e0a