Lately the Siglent oscilloscopes seem to have better specifications for the money than the Rigol Scopes.
The equipment you need depends a lot on the stuff you want to do.
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Power supply:
A lot of electronics stuff is much lower power than it used to be and a "standard" 30V 3A lab power supply is overkill for a lot of projects.
Power supplies are also fun to build from a kit or from scratch, and a lot of very usable stuff can be bought for very little money nowaday's.
For a "higher power" power supply the DPS5005 is very popular.
For a lower power lineair supply, this is a decent kit:
https://www.aliexpress.com/item/DC-Regulated-Power-Supply-DIY-Kit-Continuously-Adjustable-Short-Circuit-Current-Limiting-Protection-DIY-Kit-0/32818704937.htmlThis kit needs an AC input to generate a negative input for the opamp's, but transformers can be found in lots of old / obsolete equipment.
I also quite like this idea of buying an (broken) audio power amplifier for the housing, transformer, and miscellanious parts to build a power supply:
https://hackaday.com/2018/06/18/hybrid-lab-power-supply-from-broken-audio-amp/Most important for a power supply is however that it has an adjustable voltage and current limit.
The current limit is often the difference between a simple fix, or letting the smoke out of your experimental circuit.
If you need a function generator the JDS6600 is a quite nice box. The 15MHz version is plenty for most projects andcosts around EUR60.
If you are into microcontrollers then a logic analyser is often a much more usefull tool than an oscilloscope. For an Oscilloscope you do not want an USB version, but a separate box with LCD & lots of buttons for easy access to all functions, but for a Logic Analyser you want a big (PC) monitor with lots of pixels and it is quite comfortable to use with mouse keyboard.
Nowaday's very decent logic analyser costs < EUR5. Search vor "14m 8ch" on Ebay / Ali / Banggood / China / etc. These boxes have the Cypress CY7C68013 and almost any development board with this chip can be used with Sigrok / Pulseview.
https://sigrok.org/wiki/Supported_hardware#Logic_analyzers Don't be fooled by the low price, these boxes are very capable for sniffing UART, I2C, SPI and lots of other serial protocols. The magic is in the Pulseview software and it supports decoding for lots of serial protocols.
An if you get into the limits of the EUR 5 L.A. hardware you can "upgrade" to more capable boxes.