I'm going to answer a batch of questions in this one post, so I hope it doesn't get too muddled.
KDR, I got three of them - two are on Ebay right now. My goal in getting more than one was for the extras to earn enough of a profit to cover the cost of keeping one unit for myself.
And yeah, Ebay prices are getting out of hand. I saw one guy whose "buy it now" price for the Value Pack was $1,000. That's insane. My auctions (I'm not linking to them, so please, no accusations of pimping my own sales) include a PSP Value Pack, Ridge Racers, the Famitsu PSP special issue, a screen protector, the giveaway Ridge Racers sticker, and one of them has the Demo Disc. (I only got two of those and am keeping one for myself). I started my auctions at $350 with no "buy it now" price. I'll let the market decide how much they'll go for in the end.
Ridge Racers? It's phenomenal. It really, really is. The demos I saw in the stores only only had the intro FMV and not any gameplay. I'd seen gameplay stills, but they're nothing like seeing it in motion. This is going to sound like a total "Sony graphics whore fanboy" comment, but it's worlds beyond the screens I've seen for RR on DS. And don't bother with the "use the touchscreen for analog steering" bit - I drive with the d-pad on the PSP. Downshifting and drifting through a long turn is effortless and an absolute blast. I'm not a big Gran Turismo fan and prefer arcade racers. Ridge Racers is exactly that and it does it oh-so-well. There's a reason Famitsu gave it a 37 out of 40. It's just that good.
RR is also very import friendly. Lots of English in the menus and the in-game announcer is even in English. I don't care for his voice though. It would've been a lot cooler to have Reiko-chan going "Sugooooiiiii!!!" after pulling of a great drift than some generic dude saying, "Man! I didn't know you could do that!"
I may get Lumines, but I've got Mr. Driller on my DS to satisfy my puzzle cravings right now. I may pick it up eventually though. I've got enough store credit on my points card (Bic Camera gives you a certain percentage of every purchase in store credit if you've got their card) for a free game, but I'm not sure what I'm getting yet. I'm eager for DK: Jungle Beat, and that's out on Thursday. If I cash in the points I've got saved up, I can get that - with bongo controler - for about $10. ^.^