I've got all my working analogue scopes from people who have no idea what they are. You can usually find them on ebay with the following criteria:
1. Seller doesn't know what it is or turned it on and the lights came on and that's it.
2. Seller is selling radio magazines from the 1950/60s.
3. Seller is selling cat ornaments.
4. Seller is selling old suits which are surplus to requirements.
5. Buy it now is a low price and you have to collect it because they can't be bothered to ship it.
Basically from dead engineers and hams
For me:
- Tektronix 465B 100MHz - £20 ($30)
- Philips PM3217 50MHz - £10 ($15)
- Telequipment S61 5MHz - £1 ($2)
- LG OS 20MHz - £5 ($10)
- Tektronix 475 200MHz - £10 ($20) - doesn't turn on (yes it did - think zoolander computer scene)
- Philips PM3315 60MHz digital - £10 ($20) - this one actually caught fire but was repairable.