Tandem and Tandem Rack Questions

[cmbicycles]

I'm thinking about getting a tandem to ride with my kids before the grow up too much, they are 5'2" +/- and I'm 6'5". Other than whether they will enjoy it, what are considerations I should be thinking about? Leaning towards a road tandem and taking it on the Capital trail in Richmond... but probably not a deal breaker to have flat bars.
Ive just started looking at used prices... How well would a mid 90s Burley duet hold its value? There is one with a $1200 asking price not too far from me... the price seems a bit high for a bike of that age.