Spacedom:
definitely hang on to this one. It's a fly-under-the-radar name and great you nabbed it. Space is a stronger and stronger market these days. I can't tell you a value $ of it, but if I had it I'd keep it until a price came along that felt GREAT in my gut. A name that will only go up in value with time... and if you approach the right end-user, might be nice value right now.
Anyone from realtors, to moviemakers, to special FX studios, to any corp affiliated with NASA, anyone even supplying parts/services toward space travel... or just post it around for sale and see if there are any bites.
Good name, just might need a little time for others to see that

bioze.com:
Excellent coined word. They seem to be getting pretty valuable these days if they're good... and this is as good a coined word as I've seen. A keeper until someone really wants it.
malloffers.com:
A little clumsy but has potential nonetheless. Huge if you approach the right customer and can make them see the value.
ratesapply.com/termsapply.com:
Same comment, but probably never a big price.
Nothing else grabs me for value, except retailarchive.com may be something to someone.