I had been playing the same set of Ping Eye 2's and Taylor Made Metal woods for 25 years. Then one day a few months ago I took some practice swings on the range with my brother-in-law's new set of MB712's. I didn't expect to hit them so well but they seemed very natural to me. So I decided to hunt down a set of used MBs. I found a 2 yr old set of 710s on the Bay that the owner was selling so he could upgrade to the new 712s. He also included his 585 #2 hybrid in the sale. I ended up paying 1/3 the price of a new set of 712s and received them 4 days after the auction closed. All clean and in great condition. So I've been hitting the new-to-me clubs for the last couple of months and have added another hybrid and a 904 3 wood to the bag (also from similar auctions) along with a new (used) putter and a new (new) driver. I went ahead and got a new cart bag (Nike) through Amazon to replace my old, heavy tour bag and am so glad I got the new bag. It's better designed, lighter, etc. And purchased a new Nike 10.5 driver, which I'm really liking. My old metal driver seems like a miniature club head compared to the new drivers. And I'm hitting better drives with it so no complaints at all. I'm still working on distancing all the new clubs but am hitting them straight and enjoying the game again.
PS: I've accumulated approx 250 transactions on Ebay, both selling and buying, and have yet to have a bad experience. If you do your research on the item and seller, and know what you're bidding on, it helps achieve a good transaction. Plus there are so many brick and mortar sellers on the system now that you can usually find what you're looking for from a store that lists excess inventory on the site. I bought my new driver via that method...brick and mortar golf shop that sold for close to a 40% discount thru their Ebay store.