i have mine as a ME being a CLIENT in quickbooks, then i have my clients names in quickbooks.
added to that i get notifications from the registrar
i don't often sell domains but i am sure there are notes sections in quickbooks to add that information , as really there are not much information needed, bought for this, sold for that ! years held !
i'd probably just go for MS excel or google docs whilst starting out.
its more about getting your numbers RIGHT, a combination of posts i have read seem to point to this IMO, the cost is not the cost, you have to add the time, the effort, the holding, the transfering and all these things add up.
so a program that you can enter the purchase price and then calculates the HOLDING costs and ticks up like a networked poker machine game is a good thing, you start to realise " hey shit, i have to now sell this thing for $4k or i have effectively lost money" and NOT " hey i sold this for $3k yipee" no dude, you just lost $1k
just my opinion
tim