I bought my Indigo off ebay for 400 quid and had several years use out of it now and consider it to be my best buy. Would've hated to have paid the RRP price of ?1200 when it was current, though. I learnt my lesson after buying an MC505 new at ?700 in 1999. The Korg Trinity I bought for ?1400 in 1998, new too, but I still love that and it's taught me a lot so I still think that was an OK deal for its time.
I would have bought the Indigo when it was new, but Turnkey wouldn't budge from the ?1200 RRP, so I ditched it (as I couldn't pay that much at the time). They lost out.
But synths depreciate so fast in value. Now, I reckon it's always best to get stuff second hand. You could grab a mint, fully loaded Trinity for ?500 or less, which is peanuts compared to its original RRP. There are always good bargains in the 2nd hand market now, loads of good synths less than 10yrs old. Second hand values of synths initially plummets (like a car from a new showroom) but after several years they reach a certain level where they hold their 2nd hand prices well thereafter. I think I could probably sell my Indigo on again without a loss.
But something like the TI is always tempting. However, I still don't reckon Access have drastically added enough to it yet for people to ditch their Bs and Cs. I think they would do well to re-juvenate the fascia and add more controllers (ribbon, joystick, etc.), and making the synth engine more modular. Aside from the Integration aspect (which doesn't affect the synth engine and the sound of the Virus itself), the designers seem stuck in a rut, a little.