The general consensus is that no, they're not that desirable. Some people really like certain Sansui speakers, like the Sp-2000s, but not for that price. The pair I had, which weren't quite as well built as these (sp-x9900), were pretty terrible. Very little bass considering the woofer was about 17". While I've not heard this exact model, generally Sansui is not known for great speakers and certainly the 3 or 4 pair I've heard reinforced that reputation. The "AS-xxx" series have some admirers, though, and like most manufacturers, there's probably a few outliers that prove the consensus wrong.
For that price, though, you can get much better speakers.
Welcome to AK...if you want to see some cool vintage gear, swing by Akron Antique Audio (and say hi to the owner George for me, he's the tech I use for my tube gear).