Hi there,
Serena was the 1st van in SL with a bonet and people were amazed to see such a van. But there are lot of complaints like comfort, engine issues. I rember 3 years back a friend of mine got a 252 dash one for 650,000. And those are the prices, i dont know the market now.
For me, i find its a good vehicle and worth the price.
Note-I guess Serena was the newer version for Vanet