10188 is a great set. I had two in my inventory. Now I have one. Sold the other during some eBay promo that helped it turn a $45 profit. I'll probably keep the other one for a good long time. If not as an investment, then out of nostalgia... the 10188 was born right about the same time as my son.
But I don't know if I'll be accumulating more, unless they come with a real discount. I just can't wait on the Death Star anymore. I enjoy this investing game more when there's action. I enjoy the hunt. I enjoy the buying and selling, and making a quick buck. I bought 4 Lego this morning for $200. Put them on Amazon, sold them all, and pocketed $300. I love that. I just might go out tomorrow and do it again. To make 50% profit on a DS, I'm going to have to see $750 - 775 on Amazon, or $725 on eBay. Sure it will get there... but when? How many hundreds of dollars in profit will I have missed while I wait? And of course, it's not just the DS... I'm feeling this way about most big exclusives anymore. Too much money tied up for too long, for too little. There is so much more money to be made playing "small ball".
Of course everyone has their investment strategy. I speaking mostly to new investors who are mulling over how many DS's they can get, and how fast. If you don't have a 10188 yet, get one now. It is a MUST BUILD for every Lego / Star Wars fan. Maybe even get another as an investment. But don't go out buying 4, or 8, or 20 unless you just have piles of cash sitting around and no idea what to do with it.