Test up to four independent sell sizes from an EOA's existing token balance. Each size starts from the same fork snapshot; approvals are included when needed. Sells through the token's V2, V3 or V4 market (as simulate-trade finds it) with the wallet's real BNB or ETH for gas. Returns observed sell outcomes, not a guarantee of future exit. Costs $0.04 per successful call in USDC on Base, paid with x402 in the call's _meta; failed calls are free.