It would have been a better deal with the pod, but that's still a good price.
I have one of these and it's a pretty decent scope. It should have 1M of memory and it was one of the first with Megazoom.
If you want fft, you'll need to get the gpib module that goes on the back. The ones I saw had the serial interface module, which is fine but it won't give you fft. Any of those modules will let you store multiple waveforms.
The logic cable that's supposed to come with it splits into 2 8 channel pods. Somebody is selling one now on ebay for $255 and they can be pricey. On the other hand, they were common across HP's line and if you look hard, you might find a deal. I found a 64620a 54620a LA with the cable for $50.
Somebody is selling a made-up pod using some HP pieces for around $59 right now, also on ebay.
The pod has an R/C network in it and if you want to make up your own, it shouldn't be too bad. The specs in that are in the manual somewhere. The scope side connector is just a standard 2 row header, although it's recessed a bit.