A friend of mine asked me to help him sell this gun. I can't decide whether to help him sell it or buy it for my own use. Attention 1911 and STI experts, please help me check the authenticity of this gun. It looks like an old model of the STI USPSA single stack series with some minor modifications. The etchings of USPSA and the USPSA emblem were very fine and detailed. Please help me. Shall I buy it or sell it. thanks in advance.