Premium Word/Non premium ext

[Jingles]

I've found a few premium one word generics (2 in particular that I really like) in some not so premium ext's...Is regging something like this worth the extra $$ it takes? The ext's are .io and .gs

Thanks

Edited to add: Estibot stats on one of them to give you an idea...

Frequency (Google) 2147483647
in Anchor Text 229000000
in Title 137000000
in URL 75300000
Backlinks 0
Alexa Rank Not Ranked
Traffic (Visits / Day) N/A
PPC Ads # 89
Overture/mo 1330767
Wordtracker/day 10297