Aluminum Raleighs do not get a good response from the market compared to Cannondales and Treks. The 400 was a lower end model, with stem shifters. This one has been nicely upgraded, which I often do myself for personal use, but does not do much for market value. Somewhere around $250, come riding season, maybe a little more. Without the upgrades, $150 to $175. So come time to sell it, I would return it to its original configuration.
Bike originally sold for around $300.
+1 Check the min insert line on that seat post.
DT cable stops are typical stem shifter stops.