As I said, I've only been Brixton tube to Brixton Cycles so don't know. I would just get the train and look but I'm trying to get rid of my overdraft first!
The other side of Brixton Hill (around Beechdale and Endymion roads) is pretty nice and a few friends live there. There's a couple of okish places to eat and the Elm Park tavern is a fairly ok, slightly down at heel local pub. You'll probavly see some fairly cheap places on Josephine Avenue and I think that'd be ok, as long as you don't mind the fact that it's a bit of a red light district. I wouldn't live in a ground floow flat there though!
The exact bit you linked to is on the edge of a bit of an estate on Brixton Hill, so it might not be exactly what you want (look at the satellite view and see where it changes from old terrace to flat roof council block http://maps.google.co.uk/maps?f=q&hl=en&q=Blenheim+Gardens,+Lambeth,+London+SW2,+United+Kingdom&sll=53.800651,-4.064941&sspn=13.074846,38.496094&ie=UTF8&cd=1&geocode=0,51.453828,-0.121908&ll=51.454087,-0.115957&spn=0.012863,0.054245&z=15 )
The other side of Brixton Hill (around Beechdale and Endymion roads) is pretty nice and a few friends live there. There's a couple of okish places to eat and the Elm Park tavern is a fairly ok, slightly down at heel local pub. You'll probavly see some fairly cheap places on Josephine Avenue and I think that'd be ok, as long as you don't mind the fact that it's a bit of a red light district. I wouldn't live in a ground floow flat there though!