If we assume postage to be ~15 dollars for an air service, added to the cost of the post we're looking at $65 or ~£43.
If it gets stopped by customs, there's the potential of say another ~£10 on top plus Royal Mail's frankly ridiculous handling fee of another £8. It could end up costing north of £60 for me, which I can buy a new one for shipped in the UK (I'm not really looking to spend over £35 as it is anyway).
If it weren't for the vast expanse of water between us, I'd have definitely bought it off you.