I bought my NSR from Bridgemoto and the crank seized after a few hundred miles. This is not a slur on Bridgemoto at all. Spencer is a great guy to deal with and he sells nice straight bikes. What I am saying is that you are buying a 20 year old machine that has most likely stood for years doing nothing. Spencer will get it running and get it through it's MOT, but be prepared to remove the barrels and grease the powervalves. Check the rings etc and maaybe even replace the crank seals. Bridgemoto are great guys, but thatt is no gaurantee that your fragile old stroker will last another 200,000 miles
Be prepared for a bit of spannering and you will have a rewarding bike.