Picked up a non-working Ampeg 810 cab from CL yesterday for $200. The person I bought it from got it at an estate sale in working condition, somewhere along the line the input jack was broken and never repaired properly. I took the cab home, hooked up a new jack (the old one was basically crushed so no connection would be made with a cable) and the thing works and sounds sweet as hell. The jack plate is missing, so i took a peak inside the cab and saw the speakers with serial number 1377429. A little research revealed that I picked up a 1974 Ampeg SVT, first year with the "round" back and the last year they used the old CTS speakers, before switching to Eminence. Cab is not pristine but it's in reasonable cosmetic condition. I a/bed the cab with my Ampeg SVT 810 HPC running a Kern IP777 through a QSC GX5 and the 74 was so much warmer. The HPC was punchy and mirangey and the 74 was fat and warm. Very noticeable difference. So basically I got a vintage svt cab for $200 + a $0.87 jack and what will probably be a $5-10 back plate. I thought it would be an easy repair and resale piece, but it sounds so good I don't want to let it go. Do you guys agree with my dating of the cab? What do you think its valued at?