My thoughts : Brandable right now for anti-aging products. If life-extension drugs/pills come on to the market in the next couple of decades (as is likely - they already have them for rats I believe) and those drugs/pills become tagged with the generic name 'immortality pills' (as is quite likely), then surely this domain would dwarf the likes of Pizza.com ? But would any reseller see any worth in it at the moment?
there are alot of ifs in that speculation. with the current state of things immortalitypills just sounds like an obvious scam or a joke. i wouldn't hold my breath waiting for this to have value above reg fee unless you can make a funny joke site or something with it.
if somebody invent immortality pills the value of the domain is in 5 digits until then would say low $$