Amount of the offer placed. For competitive-bidding listings, the amount bid on the item (subject to outbid by other buyers). For fixed-price listings, the fixed sale price at which the item is purchased. For competitive-bidding listings with an active Buy It Now option, this amount will be either the Buy It Now price for purchase or the amount of a bid, depending on the offer type (as specified in Action). For PlaceOffer, the currencyID attribute is ignored if provided. Regarding Value-Added Tax (VAT): Even if VAT applies, you do not need to add VAT to the MaxBid value. If VAT applies to the listing, the seller can specify a VAT percent value when they list the item.
See the
Field Index to learn which calls use MaxBid.