If the speeds are good, meter appears accurate and no other issues, then it sounds like a good buy. Make sure self-timer, mirror lockup and stop-down lever also work. If the foam seals need replacing, easy DIY and no big deal. Jon Goodman used to sell foam replacement kits and I've serviced at leat a half-dozen bodies from one kit. One benefit of the DP2 prism is the LEDs make low-light photography easier than the other meters that use the match-needle. Solid-state electronics are also more reliable than the match-needle prisms.
Remember that the F2S is a Non-AI model, so must be used with lenses that have the rabbit-ears for correct meter coupling. Stop-down metering otherwise. If you replace the prism with the DP-11 or DP-12 then you get proper AI coupling for later lenses, including AF lenses with aperture rings. With a non-metered plain prism, it's one of the nicest looking cameras IMHO.