Id be very suspicious about this motorcycle
First of all, the front end has been mucked about with - someone's put a 1969/70 BSA group tls hub in it, which is not necessarily a bad move considering the royal enfield alternative (6" brake), but it does beg questions about the forks and axles - that is to say, be prepared to hunt down the correct ones. the same can be said for the handlebars and headlight - not factory, so it might cost money to get more suitable units.
secondly, the mudguards are suspect. obviously there simply isnt a front guard, and the rear one has been tampered with. im not the full bottle on the enfield guards, but it looks as though it could be correct piece, but considerably altered.
also, you would need to track down a suitable seat
the carburettor is a later amal concentric, not the monobloc it should be (unless it should have a connie GP carb? not sure on that, but definitely not concentric)
i dont think that's where the battery belongs, so be prepared to find the necessary tinware for that
the mind boggles with regards to the forward footrests - i.e. where do they bolt to the bike? you wouldnt get much purchase on the frame's single downtube, so perhaps the forward engine mount (or much much worse, the crankcase) has been tampered with?
the mufflers arent correct, although the pipes look as though they might be okay
finally, the rear hub appears to be correct, but it's laced into a poorly made rim (looks harley)
so in conclusion, its worth a few bucks because the engine is there and complete, and from these photos the frame looks alright - in which case, once the motor's rebuilt, the rest is essentially cosmetic. problem is, its usually the cosmetic stuff that costs money. if you want the genuine guards, seat, mufflers, rim and front end, you'd better have deep pockets.
but hey, if you like restoring bikes, i say go for it!