What is this? Buck 501 or Buck 521 Impala Knife (Cabela's LE)?

This knife was purchased at Cabela's in 2008. The blade with the stigma of the usual 501, but box and handle like a Buck 521 Impala LE.
Whether has this knife any value for collectors?
Thanks!
ps: And excuse for my bad English

This knife was purchased at Cabela's in 2008. The blade with the stigma of the usual 501, but box and handle like a Buck 521 Impala LE.
Whether has this knife any value for collectors?
Thanks!
ps: And excuse for my bad English

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