There was a deal the other day that noted Solaris was only 99p instore at your local Home Bargains.
In my local yesterday I found a few others listed below at just 99p as well:
Basic Instinct 2
Vince Vaughns Wild West Comedy Show
Tim Vine Stand-up Live
Black Moon Rising
Legend Of The Mummy
There were a few others but they weren't even worth typing such as a Shane Ward Concert DVD. The above DVD's are the cheapest I have seen them and would be worth a look in your local to see if you can spot any others.