I spotted that for sale on Car and Classic at first and thought it looked very clean and original. Unfortunately when you zoom in on the e-bay photos both rear arches need work, especially on the driver's side which will need an arch repair panel. It is a lovely colour and would be a great buy at the right price, just seems a bit too expensive in view of rear arch work required.
There have been a few TIs for sale lately and apart from a mint one that was up for nearly £3000, most are around the £1000 mark. I paid £850 for my 'V' plate one nearly a year ago with 6 months mot and it's very clean and original too. Mine had a small piece of visible corrosion above the n/s of the rear bumper, which along with a bit hidden behind the bumper on the o/s I have repaired by cutting out the corrosion and welding new metal in. Not a massive job but certainly a lot cheaper than if I'd had to pay a decent bodyshop to do it.