I would err on the side of caution/error. There maybe a million reasons
(all good) for not following through or contacting you. Two weeks is a
very short period of time to condemn someone.
He has been around, he will be back.

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81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project