Ask your broker or agent for their particular standard offer form and have them fill it in with everything except the price and the location of the property. Under California Government Code Section 54220-54232, the San Bernardino County.Prepare the seller's offer on a new purchase agreement form. We buy houses fast for cash in the San Bernardino area. When you fill out this quick form, get a cash offer for your house. The three most popular contracts are: Purchase agreement. Listed below are some common questions frequently asked about property tax bills. Why do I have to pay property taxes? When selling a house in San Bernardino, you must: 1. Price your home competitively 2.