1) Have you incorporated the buyout offers into your deck? Showing that other companies recognize your company's potential even in its early stages should make a positive difference in communicating value. Consider having another go at fundraising and use resources like AngelList and FB groups related to your space to help with identifying investors and getting intros.
2) Research and Apply to YC - By "research", I mean pre-screen by contacting a few partners to ensure the investor contacts relevant to your company type, stage and size are available; and that investment terms would be and whether they're amenable to you (since your company is more advanced than the typical entrants, the standard 120k-for-7% shouldn't apply).