There's basically three main types of NSR owners.
1) Mr. Original: Wants a totally stock NSR. Bodywork, fasteners, engine etc must be original. Might fit a set of pipes 'cos 40hp is for kids. Cleans it everyday just in case. A small scratch on the superclean Pro-Arm is an absolute disaster and requires a week off work to get over the shock.
2) Hardcore Headbanger: Would have had a 350LC 25 years ago, but they're all dead, so buys an NSR with pipes and possibly K&N's. Bodywork's generally in need of repair, but that'll be alright. Rides it hard....can't be bothered to clean it....siezes or crashes it, then leaves it parked under the house for 3 years untill the girlfriend sells it 'cos can't stand the sight of it rusting away.
3) Petrol Head: Buys an NSR in any condition. Strips it and rebuilds it with every conveivable trick part available and lots of TLC. Gives it a nice paint job. & gets it featured in magazines. Everybody from categories 2 & 3 adores it and wants it.
Frank's bike slips into category 3. It's difficult to put a price on the hours spent on a project like this, and personally I think that it's worth every penny of the BIN price if it's what you want, but you don't have the time to do it.
I wouldn't buy it though 'cos it's not 'mine'.