I went into an LCS last summer and found the following (first price is what I paid, second is what I flipped it for):
Obi-Wan GG maquette: $80 ---> $200
SS/W Orc Brute Statue $125 ---> $225
SS/W Bilbo Bust $50 ---> $155
SS/W Bilbo Bust $50 ---> $90
Total spent $305+tax ---> flipped for $670+shipping
That was a decent haul, but BY FAR my best flips have been stuff I ordered online.
My best flip ever is still my MR Luke ANH EE saber #6 that I bought for $525 shipped and flipped for $1,400 the day that I received it. That thing is probably worth like $650 now.
The beauty of SW hype last summer.