Good idea? or bad?

ok, so right now i'm trying to get rid of my powerbook g4 15"..

it's currently up on ebay and i'm looking to get 950 out of it.

the specs are as follows:

1.33ghz g4
1ggb ram (1 stick)
60gb hard drive
and a combo drive.

Here's the thing i'm contemplating on..

i was looking on mac of all trades and i submitted my laptop to their sales department to see how much i could get out of it.

at first, they said 700..

i responded and said sorry, but that's too low, i'm going to see how my ebay auction goes.

then they responded back with 800.

so, i then asked if they'd be willing to do a trade for a powermac g4.

the specs on that machine are as follows:

dual procesoor 1.25ghz
512mb ram
80gb hard drive
combo drive

my question to you guys is do you think i can get 950 out of my powerbook? and if you were in my position, what would you do?

because if i can, i can get a better machine than what i'd be trading for for about 900-950 and have more money towards a monitor.