A friend of mine is selling some four high-speed oscilloscopes that need work. They are posted on ebay but you can make an offer directly if you want and i'll pass it along "4 Tektronix digital oscilloscopes? 2xTDS540, 2xTDS520 in various state of repair. One converted from picture tube to LCD. Likely enough good parts to assemble 2 working scopes and part out the rest for good money. 2Ms sampling rate" https://www.ebay.com/itm/285452652435 -jake