Does VRBO switching to per-booking fees actually hurt the end buyer math enough to move contract prices

What cap rate are these buyers using to value NOI, because $2,500 divided by 7% is a $35,000 price haircut.

The math your buyer ran is the right starting point. A $2,500 annual NOI reduction on a property underwritten at a 7 cap implies a value compression of roughly $35,700 ($2,500 / 0.07). That is the assumption doing the most work in your question, and it is also the one you cannot verify from the dispo side without knowing each buyer's actual cap rate target and how they are running the revenue projection.

Two things complicate that figure before you build it into a conversation. First, the $38,000 gross is a single-property anecdote. A buyer diversified across Airbnb, direct booking, and VRBO is absorbing a fraction of that fee hit, because 8% only applies to VRBO-sourced reservations. Your buyers who already run multichannel are likely less exposed than they think. Second, NOI compression from platform fees only matters to the offer price if the buyer is underwriting on actual projected NOI rather than a market-comp approach. Some STR buyers anchor to a price-per-door or price-per-bed figure and work backward. Ask which methodology they are using before you assume the cap rate math applies.

To your direct question: yes, you should start asking buyers which platforms they are running, but frame it as an underwriting question so it serves your dispo presentation rather than reading as due diligence they should be doing themselves. If a buyer tells you 80% of their bookings come through VRBO on a comparable property, you can present the fee structure change, show them the NOI delta at their target cap, and let them tell you what it does to their number. That positions you as someone who already ran the scenario rather than someone flagging a risk and hoping for the best.

The risk you did not mention: if this fee change shakes confidence in VRBO as a primary channel and your STR buyers start underwriting more conservatively across the board regardless of platform mix, your buyer pool's effective offer range on STR-optioned properties narrows, and that is structural rather than addressable deal by deal.

What percentage of the STR buyers on your list have told you their primary platform, and do you currently segment your list by buyer type when you push a contract?