Have tons of DVCam tapes. What are they? How to convert?

So I've got about 30-50 DVCam tapes. I don't know squat about this format. They are not mini-DV that much I know. Some are labeled "64 Advanced ME" some "128 Advanced ME". I can send these out for digital conversion, but I thought with this many tapes, it may be worth it to just purchase a used deck. I looked on eBay and it's a little overwhelming and not sure what I need. Some say DVCam and ALSO say Mini-DV. Some seem to have a Firewire port, some don't.

Any advice on how to get the video off of these? Should I just pony up several hundred (to thousands) to convert or can I get by on a $200 used deck? And if so, which model?

Thanks