I would not get it, but if you couldn't spend any more then $45 ($40 for tablet, $5 for shipping) it might be worth it. You'd have to decide if having any tablet now is better then saving for a better one.
This looks like an older pandigital model. It says "Android 2.0" and the info I quickly googled show that this actually comes with 2.0 - that is a really old version and quite limited. It doesn't look like it was supported very well or long by pandigital.
I did some quick research and didn't find much, if any, 3rd party development. When it was sold for less then $100 last year there were plenty of people asking about rooting, ROMS, hacks, etc. - but those discussions seemed to end very quickly when nothing was ever released (not even rumors of developers working on it).
If you can afford to spend more, there is a new crop of cheep tablets with current versions of Android for about $100. I picked up my cheep 7" tablet at Big Lots for about $100. It came with Android 4.0.3 and works great for what I want it for (ebooks, light browsing, note taking, etc), but I'm assuming that it will get little support and probably no 3rd party development.
My view is that these low-end tablets are basically disposable and should be evaluated for what they can do for you right now, rather then how long they will be supported or have updates available.