Just looked on eBay.uk ... so 15 pounds is more than you want to pay? I think that you may have got a little spoiled by that 2100Y console!
From what I can see, the 28 pound new-in-box one is still comparable to the US eBay prices.
I paid a bit more to get a boxless console with 2 pads (on it's slow journey from Japan), since I don't really care about the box.
Hopefully someone can help you ... or if you can wait a few months I'm going to end up with 5 of the damned things after some combined-auctions, although international shipping would be prohibitive and I might just look for a 2nd console.