What: Playstation Vita Wi-Fi
Where: Asda (in-store)
Current Price: £196.98
Let's be clear about this...this is the LOWEST price yet for the Playstation Vita Wi-Fi console on its own. For that reason, and that reason alone, this can be considered to be a good price.
If you can find someone else to buy your memory card for you/have a mate at Sony who'll give you one/will only be buying retail copies of games then maybe, just maybe this is a good bet. Or maybe you're trying to make a minuscule profit by buying a Vita below £200 and then selling it on eBay for a tenner more.
For everyone else, pre-order one of the bundles. Amazon's deal can see you netting a Vita + 8GB memory card for £209.99.
NB. Most Vita games will require you to have a proprietary PS Vita memory card.
Good spot by joshjack, but do consider carefully before you buy.