Hate to break it to you but these days you can buy durable sheer black tights - not too sheer, not too opaque - for not very much at all. I've found terrific ones at places like Lidl and Ipercoop for princely sums like 1.60 or 3.00. The look has been back for a while: iirc all the college girls here started wearing them with their cutoffs and micro shorts a year or two ago - now the bottoms are gone altogether and they just wear long t shirts or very short dresses and Doc Martens with them. The quality of sheer tights has improved a lot too. They are smooth, not itchy, don't ladder too easily and no longer do that weird zebra interference cheap nylons used to do when I was younger. Last winter, I took my shoes off and walked a few blocks home from a party in my sheer tights on a winter night - the tights did not ladder.
I remember thinking sometime in the early 1990s that black opaques are the most perfect winter trend, ever. Then they suddenly went out of fashion and stayed off the radar for a decade - or close to two? Then they had a big comeback, with people pairing them with peeptoe sandals. Last year, I realized I had stopped wearing black opaques - still have some unopened packs of Falkes. Wonder what is going to happen next 