We found this pretty Green over Black 1958 Triumph TR3A on Craigslist in Farmington, Connecticut where the private seller currently has it listed for $19,500. The private seller provides a brief, one-sentence description of his car stating that it features a recent repaint and the engine has been rebuilt. Based on the Hagerty Insurance Online Valuation Tool, the seller has Triumph priced $1,500 above the #3 “Good” level.
You’ll need to get more details on the history and condition of this Triumph, but from the pictures provided this appears to be a pretty example that will be welcome with open arms at any British car show. Good luck with the purchase!