It looks like it needs a good cleaning because the machine should shine. The electric cord looks 'modern'. The old electric machine that I have has a black cord, not a grey one.
You could email the seller and ask more questions or ask the seller to send you close up photos and make a decision from that.
$60 for an antique machine is not that much and I consider it to be a reasonable price. There's an antique Singer at a thrift shop near me that's priced at $125.