Where did you buy your Seikos? That seems a good place for selling.
Ebay, chrono24, reddit if you join.
Your watch is a nice watch to wear but not a collector's watch. There are tons of mismatched so-called Pogues with aftermarket parts or swapped dials, etc... Finding the correct reference in good condition can be a challenge. And a put together watch costs as much for service as a correct one, which is about $650 by a good watchmaker. Most people here who are looking for a Pogue want the real one so I don't think yours would sell unless it was cheap.
I spent a lot of time and money looking for and getting my watch serviced. People who trade in Seikos know the attraction for Pogues and try to sell inexpensive lookalike 6139s for the same money, which is unfortunate. It's a good example of needing to do research before you buy. Of course, if you know what you're getting and buy it for fun, that's fine too. But if you think you're getting something you're not (like a true Pogue), it can be an expensive and disappointing lesson.