Here’s an interesting one: an early 1980′s Boss DM-2 in Like New condition for sale on eBay. Only $579, woah! It even comes with the correct power supply (ACA-120) which is also in pristine condition. The DM-2 is coveted for it’s classic analog delay effect, and is the choice of many professionals. This early version is the original Boss circuit design and uses the MN3005 bucket brigade device (BBD).
Here is the link to the auction: Boss DM-2 Analog Delay Small Logo 3005 w/ACA-120 PSU Nearly NOS/Museum.
Here is a link to some more info: Boss DM-2 Delay.
Check out the Arion SAD-1 Stereo Delay. It was also produced around the same time as the Boss DM-2 and uses the lower voltage version MN3205 Bucket Brigade Device.