I was going to register 1 domain when they first started because they are so expensive..
RV.SR was available..funny..for some reason the order wouldnt go through..few hours later it was gone ! LOL
If you are still interested we have just started offering .sr at the lowest price to date: $49.95 for one year. Still pricey but a lot less than the $299 standard pricing.
I just checked and have been told that you can easily push it to another Dotster account. For transferring to a different registrar it may be trickier as not all registrars support .sr.