Gameking513

So I bought this xbox from my local pawn shop when i saw it come in for 45 bucks. I know there are better deals out there but this one looked clean and the stickers no the bottom where intact. Knowing the system hadn't been opened the first thing i did when I got home other than test the system (and relive halo 2 for a little while) was pull the case off to prep for the clock capacitor removal. For giggles and farts when I saw the focus chip above the cpu heatsink i tested the resistance on the ground port from the LPC bus and found what i'd like to think is a good condition 1.5v motherboard. Now I am really just looking for someone here with a little more experience to tell me if i found the legendary fable board or if I botched the test somehow. Also if it is real hat are the value of these? Thanks.