I see potential, seals as in the amphibians or seals like marks. $,$$$ for sure, $$,$$$ for the right guy... but remember in this case the .org is superior to the .net, whether you're talking about the animals or the symbols (rare case indeed since it applies to its two main meanings !)
Also, didn't Adam (Dicker) use to own seals.com ? I recall a video not long ago where he mentioned he had sold it but under an NDA so we have no way of knowing what the .com went for then. If he reads this he might comment on your possible expectations lol