Near to reg fee. Big.ly and How.ly more than others, but we're talking about domains with a very poor ccTLD and with no market.
However, even Top.ly is a very strong keyword, i'd give it a chance as well as the other ones.
IF you can't grace delete them (and invest the chargeback in something more valuable), you have to keep them for at least 1 year. In this case, try to sell and at least get back the money you've spent.