short, relatively meanigful name, and especially so now.
i would take it easy and have them keep offering you, until they offer you an offer you can't refuse.
keep in mind this is a "domain acquisition" firm that is contacting you, which means they are doing it on someone else's behalf.
i now would NOT part with it for less then 5k, and probably a lot, lot more.
if the money is not an issue, DO NOT SELL this for peanuts!!
btw - your link is going directly to their site. if anyone checks their logs overthere, they can now read about your dillema here.