I don't know how many Harvest Moon games you already have, but a couple of them are kinda pricey these days, and there's a lot more than most people think. I finished my collection (and all the pre-order and regular plushies) a couple years ago and now can just pre-order and buy the newest ones.
I really wasn't missing that many to begin with and it took me a few years to get the ones I'd missed. An example: I had Harvest Moon GB and GBC 3, but I didn't have GBC and GBC 2. I wasn't willing to pay eBay prices, and I can tell you at which stores I finally found both of those. And waiting for a sheep, the one pre-order bonus plushie I'd missed when the game released, to come up on eBay for less than $30 took forever too.
That being said, if I can help, let me know!
For my collecting this year, I'd like to finish the NA Shin Megami Tensei releases. Finding Devil Survivor for the DS should be easy enough, so that just leaves Jack Bros. for the Virtual Boy. I already have the Japanese one, so I'm not going to pick it up unless I can get a steal on it. I only added a couple of Game Boys to my collection in 2014, so I wouldn't mind getting a few of those. It's getting harder as I'm getting all the common colors done though.