Buyers remorse, on anything this expensive that's only gonna sit on a shelf, is quite common. It might stay, or even get worse, until the piece arrives. I think it will be a great investment, however, I don't collect for "investment" purposes. If I did, I've got loads of Star Wars stuff I've lost money on... as I so very rarely sell anything.
This piece I think will do great. Not because it's so limited, although that will only help. I think this will do great, because there's so few good Chewbacca pieces out there. It's life size, real hair, the eyes are great, & I think you could futz with the hair - a tad - & add a little more life into the piece.
I envy you greatly! I would love to add this my collection, but it's beyond my financial ability for me to justify. Please post photos when it arrives!!!
Congrats!