Only if you're caught! :shock:
If you have a 126 already, you could bring the wheels with you, or buy some second hand, or borrow some?
As for the MOT, as long as you arrange an MOT near your house before you pick it up, it is legal to drive it to the MOT station (ie for a pre-arranged test). Of course, the route you take is up to you, and could be passed your house if you pick the station carefully. You might not even make it all the way there...
As for tax, of course you can't buy tax without an MOT, and so that base is covered.
Leaving only insurance. Does your policy cover Driving Other Cars? (DOC)? If so, you can legally drive it back as long as it does not belong to you, So we would be careful with the date of sale on the transfer.
How about that for overcoming an obstacle!!
Come on, you know it's a bargain..and I'll take an offer...