How do I create a strategy to get rid of dupe content pages but still keep the SEO juice?

[editabletext]

We have about 30,000 pages that are variations of "<product-type>prices/<type-of-thing>/<city><state "<="" p=""></state></city></type-of-thing></product-type>

These pages are bringing us lots of free conversions because when somebody searches for this exact phrase for their city/state, they are pretty low-funnel.

The problem that we are running into is that the pages are showing up as dupe content.

One solution we were discussing is to 301-redirect or canonical all the city-state pages back to jus tthe "<type of="" thing="">" level, and then create really solid unique content for the few hundred pages we would have at that point.</type>

My concern is this. I still want to rank for the city-state because as I look through our best-converting search-terms, they nearly always have the city-state in the search term, so the search is some variation of " <product-type><type of="" thing=""><city><state>"</state></city></type></product-type>

One thing we thought about doing is dynamically changing the meta-data & headers to add the city-state info there.

Are there other potential solutions to this?

[editabletext]

Thanks for getting back to me!

Even if you do the dynamic meta data, that does not sound like a lot of duplication can be avoided between the 30,000 city/state pages.

That's the reason we are considering this new strategy, where we have essentially 300 unique pages, but we dynamically generate the city/state.

Is the content on these pages unique ? I mean the set of products returned, are they just unique collections or what ?

The content is unique, to a point. The pricing varies by region, but the actual products are the same.

You said these pages are showing up as duplicate content ? Where are they showing as duplicate content ?

They are showing up as dupe content on the seomoz report. Not sure if that's what you mean?

Do your stronger pages, homepage, category pages rank for your head keywords ? Do they rank very very well ?

Not sure what you're asking exactly. How do I find out what my head keywords are?

It really depends upon the overall domain authority and what other stuff is going on your website.

Over PR is about a 5 right now.

[NakulGoyal]

Even if you do the dynamic meta data, that does not sound like a lot of duplication can be avoided between the 30,000 city/state pages.

Is the content on these pages unique ? I mean the set of products returned, are they just unique collections or what ?

You said these pages are showing up as duplicate content ? Where are they showing as duplicate content ?

Do your stronger pages, homepage, category pages rank for your head keywords ? Do they rank very very well ?

It really depends upon the overall domain authority and what other stuff is going on your website.