The 515A was manufactured from 1957 to 1971. It is a general purpose scope
with a bandwidth of 15 MHz. Value if aligned and working properly is about
$75, however, an old scope is somewhat like an old piece of medical
equipment. Those that need them buy something newer, and if you do not need
them, they are not of much value. I like old scopes and have a number of
old Tek scopes. I get them only because people give them to me and I would
not pay to have one shipped. Most of the tubes in the 515A are so common
that they have no real value.

You may be able to find a manual for downloading, but the scope is a complex
instrument and it is difficult to diagnose by e-mail.

Value in present condition is to see if someone will haul it away, or try to
fix it yourself after finding a manual.

Colin Lamb