No matter how conservative I am with not roaming the wastes repeatedly looking to profit on slaver-raider wars, fact of the matter is that I rarely buy anything at all in Fallout 2. Maybe a few armors and the occasional high-end weapon, but I always have more money than I can spend, more guns than the shopkeepers can pay me money for, and more ammo than I could ever shoot. To truly make it challenging, the game needs a cash sink.
Fallout 3 has the equipment repairs which keep you from getting rich too fast, though around level 15 you can build a fort of caps anyway, depending on your Barter skill. Maybe something like that could be worth putting into Fallout 2, now that we are discussing lofty ideas? You'd need a similar weapon to cannibalize now and then, failing to do so would cause accuracy penalties and more crit failures, and the delay between needed repairs would be depending on your Repair skill, with some Science needed for energy weapons. Yeah it'd suck, but that's realism for you.
And someone should modify that barter skill so that it affects your sell price, since you always sell stuff and never buy. I heard some guy, wosshisname, did just that, it's probably worth checking out.
Oh, and if I get around to it I'll release a version with a few more options for weapon prices, ammo weight and stack size, ranging from normal to sadistically cumbersome. As in ammo comes in stacks of 5 and guns you can find yourself sell for chump change, while the ones you don't find, like the Avenger minnie, are monster expensive to buy. I also want to take a look at the maps and random encs, but that means a lot of extra compatibility work with the Megamod and the RP, so that'd take a while.
Cheers folks!
P. S.
Lazlo, I always go for an Unarmed/Throwing build, with the HtH Evade perk you can walk around with a Mega Power Fist and a Plasma Grenade and still get the AC bonus!