Meh.
$9.99 is steep for these. Each is about a decade old. Neither does anything particularly worth remembering now. They're just FPS shooters. Yes, they're important in the history of the genre, but your $9.99 can go much, much further with any of dozens of games influenced by these two that do everything they do better.
I loved UT. I had been an Id fan up until that point, but was shocked to discover that, in my eyes, UT destroyed Quake 3.
However, that nostalgia isn't worth $9.99 to me. Especially as so much of what made UT fun was playing online, something less likely to happen now.
I'll pay $9.99 for old games, but they have to be games that do something that either hasn't been done since or hasn't been done as well since. A lot of old strategy games fall into that category, as do many god games, etc. FPS games? Not so much. Some manage to stay distinguished 8+ years after release, but not many. I don't see either of these being amongst them. Not for more than $4.99 at least.