Keith Courage - $0.00 (I'm serious, I posted an extra copy I have on eBay for $0.01 and nobody bought it)
The rest of I'm not sure on exact pricing these days, but $45 is an OK deal for that bundle. I probably wouldn't have paid any more for them. Splatterhouse & R-Type are completely awesome, Military Madness is cool if you're into that type of game, Pac-Land has shrill music but is otherwise a fun distraction every couple months, Neutopia I've never played but understand it's a Zelda 1 ripoff, Bonk's Revenge you already own, and Keith Courage and JJ & Jeff are throwaways.
For me, buying games is more about what they're worth to ME, rather than their current market value. I already own everything in that bundle except Neutopia and JJ & Jeff. If I ever sold off my collection and decided to re-acquire some titles for my TG, I'd probably only bother with 4 out of those 8.
If you like all those games and think $45 is a fair price to pay, then you got a great deal. That's the way I usually look at my transactions.