I have two.
I bought a used Marshall JTM45 reissue for $600 off of a dude on the old Plexi Palace forum back in early 2Ks.
In 2003, I modded it to vintage ~1966 JTM45 specs using Lord Valve's instructions. This included a PTP board and components, new OT, lower filtering, Mullards, VA KT66s, etc.
Then 10 years later I modded it again to be more like a Superlead front end and modded the back end to handle EHX 6CA7s. And it runs off a variac (100v) now.
I also have a bone-stock, all original '67 Fender Deluxe with the original glass (RCA, Bugle Boy, Telefunken, etc) and the original Fender amp cover. It had been sitting in some dude's mom's house in her closet for decades. He had bought it new in the late sixties and was in a band after high school but then put away the band thing after a few years for college or something, and his mom held onto the amp for him.