Allen & Harris are currently offering a 50% shared ownership scheme for some brand new flats in Faringdon Road. It's in partnership with Jephson Homes Housing Association (
http://www.jephson.org.uk/). You can get a 2-bed flat for £63,000
Otherwise, Ridgeway are doing a similar scheme, with a 2-bed flat in Dovedale (which is near Blunsdon Abbey, I think) for £67,000 - again it's a shared-ownership scheme.
If that's a bit far out, you can get somewhere with Sarsen Housing Association in Priory Vale. They're advertising shared-ownership places for approx £68,750 for a 2-bed flat.
There's others available.... have a look on right move, you'll find 'em easily enough.
If you do decide to look into shared ownership, then this info from one of the housing associations may also be useful to you...
Lenders who have historically offered mortgages on Shared Ownerships Schemes, include:
• Abbey National Plc
• Barclays Bank
• Bradford & Bingley
• Bristol & West
• Halifax Plc
• HSBC
• Nationwide Building Society
• Norwich & Peterborough Building Society
• Portman Building Society
• Woolwich Plc
If, however, you don't want to go down that route, you could buy somewhere in Park North for £74,999. It's a 2-bed flat in a high-rise block. If you're from Swindon, you'll know Park North, and you'll understand why it's so cheap
Failing that, there are plenty of 1-bed places for under £100K - in pretty much all parts of town.
Hope that helps