The bottom line is that downloading any music that isn't specifically offered for free, regardless of whether you've purchased it in the past, is illegal. There are no ifs ands or buts about it.
When you say you and your father "pawned" these albums, I think you mean "sold" not pawned. Pawning means you borrowed money and used what you pawned for collateral on the loan. If you pawn anything, you still own it, unless and until you do not repay the loan, for whatever reason, within the allotted time frame for repayment. It is highly unlikely that a pawn shop would loan money for a single recording, and it is very unlikely that any pawn shop would loan money for recordings that aren't highly collectable. I suspect the recordings were not pawned, but sold.
If they were actually pawned, all you would have to do, if it's not too late, is repay the loan, and you get your property back (no need to illegally download them). If they were pawned, and you did not repay the loan in time, ownership of the recordings, according to the loan agreement automatically transfers to the pawn shop. You don't get them back, and lose all rights to them. Yes, you did pay for them in the first place, but now the pawn shop has effectively paid YOU for them by virtue of the fact that you owed them money and didn't pay them back.
If they were actually sold, which is not illegal since you did pay for them in the first place and are deserving of some amount of money in exchange for them, ownership of the recording goes to the person that bought them from you, and you no longer own it. Also, the recording company and artist are not part of that deal, so they get nothing from the deal you made, but did get something once, from your initial purchase. Since you no longer own the recording, but have transfered ownership, you no longer have any rights at all to the recording, and are therefore stealing it by downloading it for free.
You, nor anyone else has any rights to the copying of that recording, ever, except (in the U.S. at least) for the exception of making a copy for your own personal purposes, as a back up for the recording you bought. If you want to get really technical, even if you recorded a CD, then sold it, you're supposed to either destroy or transfer the copy to the person you sold it to, but we all know in reality that never actually happens.
I get that your question is one of morality, and not legal, so you really have to ask yourself whether breaking the law is moral. The legality/illegality of downloading recordings that aren't specifically offered for free is really not debatable. It's illegal. Period. Is it moral? That's a different question, and in the case of pirated downloads, is a highly debatable topic.
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I'm not likely to be around much longer. As before when I first signed up here years ago, I'm finding that after a long hiatus, and after only a few days back on here, I'm spending way too much time here again already. So I'm requesting my account be locked, banned or whatever. It's just time. Until then, well, I dunno...