360 Pro trade-in for.......

I currently have 360 Pro 20gig. I've had since Gears 1 came out. It lacks the HDMI port the newer 360's have. I've been wanting to upgrade to the Elite and I'm about ready for it. I need a larger HDD which the Elite has and HDMI. I want to trade-in my current 360 for the Elite and was wondering if anyone else had done this. Also, where is the best place to do it? How much were credit were you given? My 360 has been kept it excellent shape still have all paper work and box. I also would like to know how you went about transferring data from one HDD to the Elite HDD. Would the store you bought it at do it? For a fee? Any help would be appreciated.

I may I may sell it but first I want here peoples experience with trading it in. Thanks for your feedback anyway.

Not a lot since the old consoles are now obsolete... and a 360 only cost $200 now... you are looking at maybe $100 trade in value... if even that...

Thanks for the help guys. I'll see if I can sell it otherwise I'll have to trade it in.