The Opteron I have running at 293MHZ bus, I'm sure it will go higher with the right motherboard (I'm using an Asus A8N-SLI Deluxe). I'm asking $250. for it. The 7800 GT I have not tried overclocking, for what I do there wasn't much of a point in it. I'm asking $200. for it.
I also have 2 Seagate 7200.9 SATAII drives, a Plextor 716A DVD RW and 2X512 sticks of PQI Turbo DDR500 memory. If anyone is interested make an offer on any or all of this.
I will accept Paypal and will ship the items the day after I receive payment.