Last spring I bought a lode mining claim in southern Arizona from Gold Rush Expeditions (GRE). I purchased this claim from GRE because I felt that they were a reputable, professional company. In September I received a notice from BLM that they wanted an amendment to the Notice of Location that had previously been accepted by the county and BLM, or else they would terminate my claim. I contacted GRE and they quickly responded to this regulatory change by BLM and submitted amendments to the county and BLM, which have been recorded successfully. It is one thing to have a company complete a sale and accept your funds. It is another to have that company come through for you after the sale when it matters.
I highly recommend GRE as a competent company with integrity. I would go back to them again in the future.