I assumed this was in Leics as Max says... listing says for collection. I'd bet there's more than a 50% chance this is new new stock being sold as new old stock.
Before buying/travelling I'd want a photo of the ID plate with year/serial no.
Don't think it is the proper Tohatsu fuel tank either as the cap should have an integral gauge and the connector is different.
Also despite it saying there is a 12mth warranty I'd only buy if I was willing to deal with any issues myself and forget the warranty. The guy's had 8 different Ebay IDs over the past 9yrs!
If I really wanted to buy brand new I'd probably give the Gumtree guy another look...
At least it's all new in the box and someone on here has used him without problems.