I decided at last to get a 1TB £117 SSD on black Friday. Made an order and it was accepted by the usual big retailer. Shortly after I was informed that delivery would be from end of Dec to Feb. Not really miffed since it was for me, not a Christmas present for someone else (the bill would then come much later). Also I had been looking on Currys site at Dyson vacs, but even 10% discount was not enough to tempt me. Next day my web viewing was showing ads from Dyson Direct. Among the offers was an older version (V6) at £180, which I took. How did a Currys view generate a Dyson Direct advert?
My opinion is that older stuff can be better than newer, since manufacturers' research is often directed at product cost cutting rather than improvement. Mr Dyson may be the exception, but improvements are often just tiny increments and not worth the price hike (eg Intel). The gadget Show recently compared old with new and a 12 year old secondhand sound system soundly beat a new one at a higher price. I rest my case.