PCI Express x1 video card

Just wanting to use an old office PC as a bit of a test bed but want to upgrade the graphics, only problem its only got PCI Express x1 video card slot. Had a look around but those I've seen are not cost effective as its only a test bed. Anyone know where I can get a 'cheap' PCI Express x1 video card?

You can usually add a normal x16 card in by either modifying the slot or card or by using a riser cable. Just use an old slow card as the bandwidth of x1 will be a major bottleneck. Still better than PCI though!

OK, will explore ebay for a suitable candidate :)