Is the current list price of £12,440 a massive increase during the intervening years? Probably not when you consider 5 years of inflation.
Fiat list prices, like those of many mainstream manufacturers, are set to leave headroom for generous p/x allowances & attractive finance deals. Most other Fiat models sold for cash usually left the showroom with discounts of up to 25% off list, but the 500's popularity at launch meant the car was almost never discounted and at one point, low mileage used cars actually sold for a premium over the new list price.
Cars bought under the scrappage scheme were generally sold at list to cash buyers & low cost finance was usually not offered. One criticism of the scheme was that most, if not all, of the £2k on offer could otherwise have been negotiated by a canny buyer & the scheme effectively did nothing to reduce the price of new cars. It made things difficult for cash buyers, because there were generally far fewer discounts available when the scheme was running.
Scrappage was all or nothing - manufacturers had to offer it on the same terms across the range or not at all. Fiat wouldn't otherwise have offered the 500 under scrappage. Indeed, I had to go to four dealers before I found one which would actually sell me one - the first three said they could sell their entire allocation to non-scrappage customers and wouldn't accept my order. I had to wait four months for it, and pay an extra 2 1/2% VAT in consequence; but I did get the 2010 model (with S/S & revised suspension) for the 2009 price.
When the scrappage scheme was running, choosing the 500 was a no-brainer - it was just about the only small car you could buy where the £2k discount couldn't have been got by any other means. For the first couple of years, depreciation was practically zero and five years on, I'd easily get half of what I paid for it back. You won't do that with a new 500 bought today.
If you've got £12,440 cash, IMO you can buy a better new car than a 1.2 500 lounge.