If you still have your old car task discs hanging about, you could be on your way to making some serious bank.
The tax discs may have been abolished almost four years ago by the DVLA, but did you know that people collect them?
In fact, people have been collecting tax discs for almost 100 years. The collectors are called velologists and pay princely sums for vintage tax discs - and now that we don't use them any more, there are less on the market. Even the newer ones are of interest to these unusual collectors.
There's a whole community of people who collect tax related memorabilia - they even make special holders for tax discs. I wonder if they're just as keen on paying their tax?
This one can be yours for the princely sum of £350 ($470):
And this old tax disc from the '30s is up for £800 ($1070) - that's with a £200 ($270) discount, naturally.
Almost two billion tax discs have been printed since 1971 - so there may be a lot of old ones out there. But the velologists don't want any old tax discs, of course. They want the unusual ones.
It's not just unusual old ones, however, the velologists are after some recent tax discs, too - the year 2003 was the first time that a disc had a bar code on it, and that's the sort of detail that can make a velologist lose their shit.
Meanwhile, in 2014, the DVLA ran out of perforated tax discs, so people had to cut out their own. These are in high demand among the pernickety collectors, and they're subsequently considered to be 'limited edition'.
And of course, the last ever tax discs hold a special place in the velologists' hearts. They expired in 2015, so not that long ago.
If you've got any lying around the house, why not pop them on eBay and make some cash? And more importantly, bring some joy to a velologist.
Of course, people collect all sorts of things that you wouldn't imagine to be worth much. Appearing on Pawn Stars, one man claimed to have world's number one arsenal of Pokémon cards contained inside a metal case.
Gary has some of the rarest and most sought-after cards on the planet - one card alone was estimated to be worth $30,000-40,000 (£21,600-28,800) and he looked particularly chuffed about the appraisal. As you would, I suppose.
Brb, just off to see what valuable shite I've got hidden away at home.