Trace Oscilloscope Model
What questions to a prospective oscilloscope seller on Ebay are wise questions?
I see many scopes for sale, but most say "it comes on" when powered. or "it needs calibartion" , or it has no probes or power chords.................
I dont know how to calibrate, and doubt I could find a power chord for a particular model scope. What im afraid of is purchasing a scope with missing items which may render it unusable, inaccurate, or undesireable. I can deal with dents and scratches, and know I can purchase probes for around $40 +-. Hardly any offer much assurance of being ready to use for the price. I think I am settled now on a Techtronics 100 Mhz Dual Trace Analog scope
and while I want to buy reasonable I want to buy wisely.
Assuming I know what kind of scope I want, I am asking for ADVICE on what I need to consider from an ebay/or used seller to ensure I have a useable and as advertised scope.
You should be afraid.
If you are buying a scope sight unseen you are going to want to know that it actually works. No probes or no power cord is not a problem, as long as the seller has probes and a power cord and has verified the scope works.
Needs calibration may mean "it didn't work for me".
It comes on may mean that a light turns on.
Buying from a reputable seller who has stuff like that in their history and makes assurances it works will increase your chances of getting a functional unit. If you are looking to save money, you might be better off getting one locally - even if it costs more. Check craigslist, pawn shops or local school auctions.
A look at what is currently available on eBay
 Oscilloscope TRIO 15 MHz Model CS-1560A Dual Trace US $279.99 
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 BK PRECISION Model 2190B 100 MHz Dual - Trace Oscilloscope US $1,295.00
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 HUNG CHANG 20 MHz Dual Trace Oscilloscope Model OS-620 US $75.00
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 SIMPSON MODEL 452 15MHZ DUAL TRACE OSCILLOSCOPE US $349.99
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 B&K Precision 80 MHz dual timebase quad trace Oscilloscope model 1570A. US $225.00
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 B&K Model 1474 Dual Trace 30MHz Oscilloscope US $149.00
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 HEATH/ZENTH DUAL TRACE OSCILLOSCOPE MODEL SO-4550 US $150.00
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 E & L INSTRUMENTS MODEL 620 DUAL TRACE OSCILLOSCOPE US $99.00
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 TEKTRONIX DUAL TRACE 100 MHZ OSCILLOSCOPE MODEL 465 US $299.00
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 Heathkit Dual Trace Oscilloscope Model IO-105 - Professionally Assembled US $29.99
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