I'd offer £45 for the lot but no more. These parts, have I assume been heavily used.
- There's no hard disc drive
- no operating system
- no software
- no warrenty
- unrated 333mhz ram, it's not even PC3200!
- no support
- no monitor
- no keyboard
- no mouse
- no photograph showing the condition of the system
- no case
- an under-rated PSU wattage
I have no idea what delivery service you are planning to use, nor the lifespan and previous usage of the system. For all I know you've been running it at an overclocked speed for the last two year, thus futher reducing the component life span. Sorry, but your price is pretty unrealistic. It's unlikely to run any software written within the last year well, let alone anything new. I wish you the best of luck in selling it, ebay is your best bet, there's more chance you might find someone gullable enough to pay that price on there, but don't expect it too! Seriously, shove it on ebay for 0.01p with whatever the postage is, and see how it does. It's your best bet to rid yourself of it.
