how much are these desktops worth? are my prices fair?

im trying a few desktops, one of which is still being worked on to be sold, the other two are complete, the problem is, i have not had any buyers yet for one of them which has been up for a while, both on ebay and craigslist, i have it priced higher on ebay a lot higher obviously due to shipping and fees, but still have not getting any responses, for ebay, i get barely any views and no watchers, and for craigslist, no one at all has messaged me after like 2 months. the more recent desktop i have complete, ( no monitor, mouse or wifi card ), has not gotten any responses in the last week or so, which isnt that long but i still wanna know if my prices are fair. also no luck on facebook trying to sell things, i guess i need to go to a forum or place with a lot of geek type people.

anyways, here are the specs to more recent one below -

. pentium 4 2.4ghz single core ( northwood without hyperthreading )

. 2 GB ddr ram

. windows 7 32 bit operating system fresh install

. 80 GB hard drive, western digital ide interface 7200 rpm

. motherboard has 4 usb ports, 3 pci slots, etc

. dvd rom

. 8 MB graphics card matrox brand

. 300 watt power supply ( some oem brand for dell / hp / gateway / etc )

. working usb keyboard

what i stated - needs a quieter cpu fan, since its a little loud, wifi card, and better graphics card to make it perfect, i can add these for an extra 40 dollars, making the price 65 dollars firm.

MY price without the extras - $25 firm, price with all those extra things - $65 firm.

and here is the other one below which i have on both ebay and craigslist, on ebay, i have it for 350 dollars free shipping, on craigslist, only 260 dollars picked up locally. btw, i forget to mention that this desktop is only one month old, hence why the price may seem a little high, though i dont think it is, all the other desktops on ebay have weaker specs and cost either the same or more, here are the specs -

. CFI mid tower computer case with front 120mm fan

. Asus DVD burner

. Encore Wireless N wifi card with cd driver

. Gigabyte lga 1150 motherboard

. Intel Celeron g1820 dual core 2.7ghz cpu

. Intel hd 2500 graphics ( 448 MB allocated currently, this is the max amount )

. Alpine 11 plus cpu cooler with prolimatech pk3 thermal paste ( offers slightly better cooling than original cooler )

. 4GB ddr3 1333 ram ( 1 stick )

. Samsung 840 Evo 120GB solid state drive ( about 97.9 GB free ) front fan offers some passive cooling, ssd comes with cd for samsung magician / migration software. rapid mode is currently enabled.

. Corsair cx430 power supply, 80 plus bronze certified efficiency ( plenty of power for this system and room for upgrades )

. Windows 7 Ultimate SP1 64 bit operating system, no cd but license key will be included