Yeah it's dropped so normal reg fee. If I was to forward it to my own site, would It help it with domain authority? Cause my current sites Is like 5 haha.It would depend completely on the price. If it's $10 I say yes, if it's $50 meh. If it's already been dropped and available for registration then yeah sure.
Can you quote your source please ?Remember that redirecting 404 pages now does not count as it used to
if it has just one drop then go for it (worth $50) otherwise leave it.domaintools.com
you have to redirect every old link to your new links (you have to recreate old links that the websites had before)