When I picked up a used 10030 ISD, it was in similar shape. All the important stuff was there, maybe $20-$30 worth of BL parts needed, but no plaque sticker. I ended up ordering a new sticker from a guy in Australia on eBay, and was sure to note that it was not an original sticker in the listing. Sold without issue.
I guess I'd figure out whether it's worth your time, effort, and money to complete it vs the potential selling price of individual expensive pieces vs "as is" condition.