In reply to kingholmesy:
> Troll Rocker works well and is cheap if you can find one on eBay (they don’t make them anymore).
They're still in production as far as I know - it ceased to be the Troll Rocker after Troll was bought out and closed down by a large French company in the early '90s, but the venerable Rocker lives on under various different names. Eg: https://www.abaris.co.uk/Rocker-Rope-Lock
I wouldn't buy a second hand Troll Rocker personally (the purple one without a parking brake). I know these things don't have a sell-by date as such, but even the most recent ones will be pushing 30 years old by now.
Perhaps I should mention that Troll lives on too - the company name was bought back by a former director some time after the Uppermill factory was closed down. They've crossed the Pennines into Yorkshire and they don't do 'technical' climbing equipment any more, but they're still making some of the classic Troll products and a few new ones here: https://trolloutdoors.com/
I had never heard of the Taz Lov before reading this thread, I'm intrigued.
(But holy moly, it had better be pretty special to justify that price tag!)
Post edited at 20:11