MX-81 Hypersonic Operations Aircraft #7644 worth

The catalog data I have for the "MX-81 Hypersonic Operations Aircraft #7644 — LEGO Space Set Value (LEGO Space)" is not detailed enough to give a specific valuation, as the item details could not be retrieved. However, based on the information you provided, the used sold value listed is $187.89. For the second item, "LEGO MX-81 Hypersonic Operations Aircraft (7644-1) (Mars Mission)," since it is unpriced in the catalog, I recommend checking the live eBay listings shown on your screen for current asking prices to gauge its current market value.