I use Adobe Design Collection Education Version (the one before CS). There are no notable differences between Education and Retail. I wasn't aware of the missing actions you pointed out, but I doubt they are a real problem. The only true difference I know of is you don't get the stock photography CD for Photoshop in the Edu version. The apps are *exaclty* the same (as far as I can tell).
If you're intitled to the Edu suite, buy it new (you're not allowed to get it second hand: see licence agreement). If not, pick up retail either new or second hand.
NB: If buying off eBay, make sure you get all the original CD's, books and registration numbers.