It takes about $50,000-worth of digital scope to outperform a Tektronix 7834 analog storage scope for a single-shot event. Single-shot events have always been the weakest area of DSOs. They can take enough samples of recurrent events to flesh out a waveform, but a single-shot event, especially a step signal, takes a mighty high sample rate. I've used lots of digital scopes, but if I have to pick one, I'll still stick to a good, lab-grade analog model, especially if you compare price to performance.
The equipment is old, but quite useful. ebay is generally the mode to get rid of it, but you can get burned that way, too. You have to make sure that the buyer pays the shipping on that 549!
Dean