When a potential customer comes into my store and announces their budget (I ask) is $300, they are NOT shown vacuums for more than $300. They told me they cannot afford a more expensive machine. Why waste time showing someone a vacuum that's a THOUSAND dollars more? The most expensive vacuum I've ever sold in a store is $600. Door to Door is different, I sold $600 Rainbows in 1979. But in a store there's no captive audience.
I guess if someone is asking for advice, you give them advice based upon assuming they're telling you the whole truth. No one recommends a $1300 vacuum to someone with $300 in their 'budget'. You tell them what the best $300 vacuum is. I consider it an insult to talk about a vacuum that a customer TOLD you they cannot afford (even if they can but won't tell you). Until they tell me the truth, I cannot make an accurate recommendation. Even if they told me their budget was $2000, I still wouldn't sell them anything more than what they need. Of course, I'm talking about regular, normal people who need a new cleaner to whom a vacuum just an electrified broom (99% of the population).