That 555 in the USA at 1000 bucks in unknown condtion was a bit steep... this one might be better, just popped up in Frog land at noon :
https://www.leboncoin.fr/image_son/2003929489.htmA 556 not 555, in mint condition, with its cart (the nice variety with extruded aluminium structure), and TURNED ON for a change !
CRT looks alright, and there is "something" on the screen, enough to witness some vertical and horizontal activity... so the fundamentals are all there.
350 Euros, ON OFFER ! I don't know, add 20% or so to convert that to Yankee bucks, say 400 USD ? Negotiate to 350 and it's yours. To be picked up near Paris.
Still too expensive for me and no love affair with the bulky 555/556 so I will pass, it's yours !