As a Springer owner myself I thought I must have my say:-
They were built over many years it is very hard to find a standard spec. for these boats (eg. our boat is 38.5 ft in length & has a 6mm bottom & 4mm sides & top, built in 1989). Yes it is all wavy down the sides & you can see where all the welds are; however the actual design/engineering is far better than many new boats being sold now, it just doesn't look so pretty.
The cost sounds high but I am sure there is room for negotiation in that - find out who replated it & see if they are a reputable company, if you are happy then definately have a survey, its always a good negotiation tool & what price do you put on peace of mind.
Regards
Ian