Audi S4 (C4)

The C4 Audi S4 is trading around US$4,200 in the current market, though the minimal transaction sample size limits confidence in establishing a reliable price trend. With only one sale tracked over the past twelve months and zero active listings, this model remains largely invisible in the secondary market.

The C4 generation sits in the stable modern classic tier, occupying the space between everyday used cars and serious collectibles. The model carries a collectibility score of 5, indicating recognized appeal among enthusiasts, though broader market desirability remains low relative to comparable performance sedans from that era.

Liquidity is extremely constrained, which creates friction for both buyers and sellers. The absence of meaningful transaction volume means pricing discovery is difficult and execution risk is material for anyone looking to move inventory quickly.

The data set is too small to support directional commentary on valuation momentum or realistic three- to five-year projections. Until more transaction activity surfaces, prospective buyers and sellers should treat isolated ask prices as starting points for negotiation rather than market benchmarks.