
Well my friend offered me his mark 2 for $2,100, but my sale for my 1ds didn't go as planned (my fault). I have a choice..either keep my 1ds and buy his 1ds2 out of pocket, or pick up a 24-70L and 70-200L next week. I think I'm going to just invest in glass

As much as I love my 1DsMkII, I think investing in good glass is probably the smarter move.
Keep in mind, right now, the mkII is only one generation old. Once the MkIV comes out, it's going to be considered an absolute antique and it's street price will take another heavy downward dive.
Hold on to yours, the 1Ds classic, for another 8 to 12 months, enjoy the new glass and then next summer, you might be able to scoop up a MkIII for around $3K or a mkII for maybe 1200 bucks.
Cheers!