The Signatum was at one time an epoch-making event that changed the minds of many miners and created a fresh look at the altcoyins. It's a pity that this project turned out to be an epoch-making swindle that broke many hopes and hearts. And apparently I was wrong at the time with the decision not to change my SIGT to STRAKS ... it was a mistake ...
Although the price of SIGT is really low, you can still sell them on Yobit:
https://yobit.net/en/trade/SIGT/BTCIt is very difficult to force yourself to sell coins with a huge discount that is ten times less than the price of the initial purchase. Probably it's better to continue to keep them on the local vallet, maybe someone else will be interested and make a new swap ...