[quote name='Rockabye']You could also hold out hope for a GOTY edition eventually. That's what I'm doing.[/QUOTE]
^I second this.
The odds are favorable enough (and I'm definitely cheap enough) that I think it'll be worth it to sell/trade the copy I picked up for $30 (even if I can manage $15 out of it, the 70+ hrs I poured into it would be worth the $15 "rental") and pick it back up for the likely eventual $40 "complete" edition.