Domain names are worth about $0.25 (what malware distributors would pay for any random domain) until someone is interested in purchasing it for a given price, and has the capacity to purchase the domain for their offer.
Valuations value how much a domain is worth if someone is interested in purchasing it, and has the capacity to purchase it.
While it is plausible that the domains will be sold for, say $200 each, they are not easily liquidate. Seriously, nobody will buy them for even $10 in an auction. It is only when someone has an interest in that domain, then it would be possible to liquidate the domain for anywhere near any valuations.
I recommend cancelling the collateral status of the loan, or more appropriately value the domain names. I recommend a valuation price of $20 per domain, and I believe that is stretching it.
I'll lower the valuation to $20 per domain. Masterful did offer about 77 more domains, so at about $20 each, that should be about $1,450 maximum collateral. The reason I valued those two domains to about 1/3 of their appraisal value is because they're really popular keywords in the financial world, which makes them a little easier to sell/liquidate.
you would "suppose". Good luck trying to sell 2 useless domains if the lendee defaults. I'd suggest you stay away from domain names unless you have a confirmed offer/value upfront.